document.write( "Question 528169: A 50 milliliter solution of acid and water contains 25% acid. How much water do you need to add in order to make a 10% acid solution? \n" ); document.write( "

Algebra.Com's Answer #349163 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+w+\"$ = ml of water needed
\n" ); document.write( "given:
\n" ); document.write( " $\"+.25%2A50+=+12.5+\"$ ml of acid in 25% solution
\n" ); document.write( "---------------
\n" ); document.write( " $\"+12.5+%2F+%28+50+%2B+w%29+=+.1+\"$
\n" ); document.write( " $\"+12.5+=+.1%2A%28+50+%2B+w+%29+\"$
\n" ); document.write( " $\"+12.5+=+5+%2B+.1w+\"$
\n" ); document.write( " $\"+.1w+=+12.5+-+5+\"$
\n" ); document.write( " $\"+w+=+7.5+%2F+.1+\"$
\n" ); document.write( " $\"+w+=+75+\"$
\n" ); document.write( "75 ml of water is needed \n" ); document.write( "

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